5501721 has 8 divisors (see below), whose sum is σ = 7506400. Its totient is φ = 3582432.

The previous prime is 5501707. The next prime is 5501723. The reversal of 5501721 is 1271055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5501721 - 2⁷ = 5501593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5501723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21196 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (938300).

Almost surely, 2^5501721 is an apocalyptic number.

It is an amenable number.

5501721 is a deficient number, since it is larger than the sum of its proper divisors (2004679).

5501721 is a wasteful number, since it uses less digits than its factorization.

5501721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42695.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 5501721 is about 2345.5747696460. The cubic root of 5501721 is about 176.5358261478.

Adding to 5501721 its reverse (1271055), we get a palindrome (6772776).

The spelling of 5501721 in words is "five million, five hundred one thousand, seven hundred twenty-one".